Phase optimization of antenna array gain with constrained amplitude excitation

Voges, R.; Butler, J.K.

doi:10.1109/tap.1972.1140237

Cited by 21 publications

(7 citation statements)

References 8 publications

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“…Optimization by adjustment of only phases is also possible (Voges and Butler, 1972). This might be attractive for arrays with active modules, where uniform amplitude is desirable.…”

Section: Constraint On Q or Tolerancesmentioning

confidence: 99%

Superdirective Arrays

2009

Phased Array Antennas

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“…Optimization by adjustment of only phases is also possible (Voges and Butler, 1972). This might be attractive for arrays with active modules, where uniform amplitude is desirable.…”

Section: Constraint On Q or Tolerancesmentioning

confidence: 99%

Superdirective Arrays

2009

Phased Array Antennas

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“…Rather, the receiver is actually within or near the volume of the array of transmitters, and thus we require modification of the standard directivity equation [26]. To this end, we define a performance index in the following manner: (11) In the numerator, is the receive antenna polarization unit vector, is the total electric field at location , is the average distance between the transmitters and receiver, calculated by (12) where is the squared distance between the th transmitter and the receiver, and is the total number of transmitters. In this work we assume .…”

Section: B Modified Directivitymentioning

confidence: 99%

Optimizing Arrays of Randomly Placed Wireless Transmitters for Receivers Located Within the Array Volume

Young

Kuester

Holloway

2007

IEEE Trans. Antennas Propagat.

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We investigate the potential of using arbitrarily placed wireless transceivers to increase the probability of maintaining a communication link in an electrically harsh environment. Specifically, we adapt a well-known matrix-based array optimization technique to the case when the transmitting elements exist in a complex environment and the receiver is not in the far-field of the array. Study of array performance in a non-ideal setting represents an important step in determining the feasibility of using this optimization technique for ad hoc wireless arrays within a building. Measures of array performance consist of median values for the directivity or gain, the total power at the receiver location, and the power per transmitter. The simulation results include array performance in the presence of a lossy dielectric corner to study the effects of building floors and walls. Our results show the median of the optimized directivity or gain for the frequencies of interest with simple boundaries is within 3 dB of that for the optimized configuration in free space.Index Terms-Ad hoc array, arbitrary array optimization, emergency responder communications, random array.

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“…As needed for comparative purposes later and for use in optimization algorithms, the gradient and Hessian of the th ground-station excess gain are, respectively (9) (10) and (11) Note that the gradient and Hessian expressions for a SL constraint have similar forms.…”

Section: Conventional Quasi-newton Synthesis Techniquementioning

confidence: 99%

“…Straightforward application of standard optimization strategies tend to dominate, as seen in [10]- [12]. An interesting technique based upon a statistical approach for the generation of low sidelobe (SL) patterns appears in [13].…”

Section: Introductionmentioning

confidence: 99%

Phase-only shaped beam synthesis via technique of approximated beam addition

Kautz¹

1999

IEEE Trans. Antennas Propagat.

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A new method for phase-only phased-array beampattern synthesis is derived. The method is appropriate for the synthesis of coverage patterns for satellite communications, where a minimax goal of maximizing the worst-case beamforming gain to a set of service locations is desired. The new approach, called the technique of approximated beam addition, is found to be computationally attractive relative to conventional methods, yet offers optimal performance. Included are a theoretical consideration of optimality and simulation examples comparing the computational complexity and convergence quality to that of proven techniques.Index Terms-Gradient methods, phased-array antennas, phase-only beamforming, shaped beams.

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Phase optimization of antenna array gain with constrained amplitude excitation

Cited by 21 publications

References 8 publications

Superdirective Arrays

Superdirective Arrays

Optimizing Arrays of Randomly Placed Wireless Transmitters for Receivers Located Within the Array Volume

Phase-only shaped beam synthesis via technique of approximated beam addition

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